Effects of molecular weight-dependent physicochemical heterogeneity of natural organic matter on the aggregation of fullerene nanoparticles in mono- and di-valent electrolyte solutions
文献类型：期刊论文
| 作者 | Shen, Mo-Hai; Yin, Yong-Guang; Booth, Andy; Liu, Jing-Fu |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2015-03-15 |
| 卷号 | 71页码:11-20 |
| 关键词 | Natural organic matter (NOM) Molecular weight (MW) Fullerene nanoparticles (nC(60)) Aggregation Electrolytes |
| 英文摘要 | Given the wide presence of heterogeneous natural organic matter (NOM) and metal ions (Na+/Ca2+/Mg2+), as well as their significant role in governing nanoparticle stability in aqueous environments, it is of great importance to understand how the molecular weight (MW)-dependent physicochemical properties of NOM impact fundamental transportation processes like the aggregation of engineered nanoparticles (ENPs) in the presence of Na+/Ca2+/Mg2+. Here, we report on the aggregation behavior of a model ENP, fullerene nanoparticles (nC(60)) in the presence of five MW fractions of Suwannee River NOM (M-f-SRNOMs, separated by ultrafiltration techniques) and three electrolytes (NaCl, CaCl2 and MgCl2). We found that in all NaCl treatments and low concentration CaCl2/MgCl2 treatments, the enhancement of nC(60) stability positively correlated with the MW of Mf-SRNOMs. Whereas, the stability efficiency of identical M-f-SRNOM in different electrolytes followed an order of NaCl > MgCl2 > CaCl2, and the enhanced attachment of nC(60)-SRNOM associations was observed in high MW Mf-SRNOM (SRNOM>100 kD and SRNOM 30-100 kD) at high concentration CaCl2/MgCl2. Our results indicate that although the high MW NOM with large humic-like material is the key component for stabilizing nC(60) in monovalent electrolyte, it could play a reversed role in promoting the attachment of nC(60), especially in long term aggregations and at high concentrations of divalent cations. Therefore, a detailed understanding of the effects of heterogeneous NOM on the aggregation of ENPs should be highly valued, and properly assessed against different cation species and concentrations. (C) 2014 Elsevier Ltd. All rights reserved. |
| 研究领域[WOS] | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| WOS记录号 | WOS:000351966900002 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32563]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Shen, Mo-Hai,Yin, Yong-Guang,Booth, Andy,et al. Effects of molecular weight-dependent physicochemical heterogeneity of natural organic matter on the aggregation of fullerene nanoparticles in mono- and di-valent electrolyte solutions[J]. WATER RESEARCH,2015,71:11-20. |
| APA | Shen, Mo-Hai,Yin, Yong-Guang,Booth, Andy,&Liu, Jing-Fu.(2015).Effects of molecular weight-dependent physicochemical heterogeneity of natural organic matter on the aggregation of fullerene nanoparticles in mono- and di-valent electrolyte solutions.WATER RESEARCH,71,11-20. |
| MLA | Shen, Mo-Hai,et al."Effects of molecular weight-dependent physicochemical heterogeneity of natural organic matter on the aggregation of fullerene nanoparticles in mono- and di-valent electrolyte solutions".WATER RESEARCH 71(2015):11-20. |
入库方式： OAI收割
来源：生态环境研究中心
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